Water Quality Testing

Water Quality Testing

When buying or selling a home in Maine, it’s important to know not only the condition of the structure but also the safety and quality of the water. Many homes in Maine use private wells, and unlike public water systems, private wells are not regulated or routinely tested by the state.

A water quality test provides clear, factual information about the home’s water supply — information that’s often required by lenders and valuable for any buyer making an informed decision.

Why Water Testing Matters in Real Estate

Water that looks and tastes fine can still contain contaminants that affect health or property value. Testing identifies potential issues early, helping avoid surprises after closing and providing peace of mind during negotiations.

Common concerns in Maine include:

• Bacteria (Total Coliform and E. coli)

• Nitrate and Nitrite (from septic systems or agricultural runoff)

• Arsenic, Uranium, and Radon in Water (naturally occurring in Maine bedrock)

• Lead (from older plumbing components)

• Minerals such as iron, manganese, and hardness, which can affect taste, staining, and appliances

What’s Included in the Test

The comprehensive water test typically analyzes:

• Bacteria

• Metals and minerals

• Nitrates and nitrites

• pH and hardness

• Other substances that could impact safety, taste, or plumbing

These results provide a complete snapshot of water quality, helping both buyers and sellers understand the property’s true condition.

When to Test

Water testing is most commonly done:

• 1. As part of a real estate transaction, especially when the property uses a private well

  2. Annually for homeowners who rely on private wells

  3. After well repairs, plumbing changes, or flooding

  4. Whenever there are changes in taste, odor, or color

In real estate, lenders often require proof of safe water before closing — but even when it’s not required, testing is a smart move for anyone evaluating a home’s total livability and long-term value.

Water Testing and Home Inspections

Adding a water quality test to your home inspection provides a more complete picture of the property. While the inspection covers visible systems and structures, the water test evaluates something you can’t see — the safety and quality of the home’s drinking water.

Together, these services give buyers and sellers confidence that the home’s physical and environmental conditions are well understood before the deal moves forward.

Learn More

• U.S. EPA — Private Wells: https://www.epa.gov/privatewells

• State of Maine — Private Well Water Safety: https://www.maine.gov/dhhs/mecdc/healthy-living/health-and-safety/drinking-water-safety/private-well-water